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Continued use of GPS running in the background can dramatically decrease battery life.
“This app declares support for location in the UIBackgroundModes of the Info.plist file.
This is used by the app in order to send geo-targetted local notifications to the users who have enabled the notifications on their phone (by monitoring a CLRegion).
Besides, the user has a choice when he downloads the app to enable the background location settings all the time, only when the app is active, or never, without it affecting the general usage of the app.”